From the beloved author of Babe: The Gallant Pig comes a charming fantasy about 10-year-old Zeta, who befriends a merman while on vacation in Scotland.

While vacationing in Scotland, Zeta meets a rather unusual fellow. He's a terrific swimmer. He chats with seals. And he has a fish tail. Marinus is a merman -- definitely not your average summer friend. Who else could teach Zeta everything from swimming to astronomy to French? Everything's an adventure when Marinus is around, and as the summer ends, Zeta knows she'll miss her new friend terribly.

Luckily, Marinus has one last surprise in store for her -- one that will last a lifetime. . . .